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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) International Business Machines Corp., 2000-2002
4 * Portions Copyright (C) Christoph Hellwig, 2001-2002
5 */
6
7#include <linux/mm.h>
8#include <linux/fs.h>
9#include <linux/posix_acl.h>
10#include <linux/quotaops.h>
11#include "jfs_incore.h"
12#include "jfs_inode.h"
13#include "jfs_dmap.h"
14#include "jfs_txnmgr.h"
15#include "jfs_xattr.h"
16#include "jfs_acl.h"
17#include "jfs_debug.h"
18
19int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
20{
21 struct inode *inode = file->f_mapping->host;
22 int rc = 0;
23
24 rc = file_write_and_wait_range(file, start, end);
25 if (rc)
26 return rc;
27
28 inode_lock(inode);
29 if (!(inode->i_state & I_DIRTY_ALL) ||
30 (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
31 /* Make sure committed changes hit the disk */
32 jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
33 inode_unlock(inode);
34 return rc;
35 }
36
37 rc |= jfs_commit_inode(inode, 1);
38 inode_unlock(inode);
39
40 return rc ? -EIO : 0;
41}
42
43static int jfs_open(struct inode *inode, struct file *file)
44{
45 int rc;
46
47 if ((rc = dquot_file_open(inode, file)))
48 return rc;
49
50 /*
51 * We attempt to allow only one "active" file open per aggregate
52 * group. Otherwise, appending to files in parallel can cause
53 * fragmentation within the files.
54 *
55 * If the file is empty, it was probably just created and going
56 * to be written to. If it has a size, we'll hold off until the
57 * file is actually grown.
58 */
59 if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
60 (inode->i_size == 0)) {
61 struct jfs_inode_info *ji = JFS_IP(inode);
62 spin_lock_irq(&ji->ag_lock);
63 if (ji->active_ag == -1) {
64 struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
65 ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
66 atomic_inc(&jfs_sb->bmap->db_active[ji->active_ag]);
67 }
68 spin_unlock_irq(&ji->ag_lock);
69 }
70
71 return 0;
72}
73static int jfs_release(struct inode *inode, struct file *file)
74{
75 struct jfs_inode_info *ji = JFS_IP(inode);
76
77 spin_lock_irq(&ji->ag_lock);
78 if (ji->active_ag != -1) {
79 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
80 atomic_dec(&bmap->db_active[ji->active_ag]);
81 ji->active_ag = -1;
82 }
83 spin_unlock_irq(&ji->ag_lock);
84
85 return 0;
86}
87
88int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
89{
90 struct inode *inode = d_inode(dentry);
91 int rc;
92
93 rc = setattr_prepare(dentry, iattr);
94 if (rc)
95 return rc;
96
97 if (is_quota_modification(inode, iattr)) {
98 rc = dquot_initialize(inode);
99 if (rc)
100 return rc;
101 }
102 if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
103 (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
104 rc = dquot_transfer(inode, iattr);
105 if (rc)
106 return rc;
107 }
108
109 if ((iattr->ia_valid & ATTR_SIZE) &&
110 iattr->ia_size != i_size_read(inode)) {
111 inode_dio_wait(inode);
112
113 rc = inode_newsize_ok(inode, iattr->ia_size);
114 if (rc)
115 return rc;
116
117 truncate_setsize(inode, iattr->ia_size);
118 jfs_truncate(inode);
119 }
120
121 setattr_copy(inode, iattr);
122 mark_inode_dirty(inode);
123
124 if (iattr->ia_valid & ATTR_MODE)
125 rc = posix_acl_chmod(inode, inode->i_mode);
126 return rc;
127}
128
129const struct inode_operations jfs_file_inode_operations = {
130 .listxattr = jfs_listxattr,
131 .setattr = jfs_setattr,
132#ifdef CONFIG_JFS_POSIX_ACL
133 .get_acl = jfs_get_acl,
134 .set_acl = jfs_set_acl,
135#endif
136};
137
138const struct file_operations jfs_file_operations = {
139 .open = jfs_open,
140 .llseek = generic_file_llseek,
141 .read_iter = generic_file_read_iter,
142 .write_iter = generic_file_write_iter,
143 .mmap = generic_file_mmap,
144 .splice_read = generic_file_splice_read,
145 .splice_write = iter_file_splice_write,
146 .fsync = jfs_fsync,
147 .release = jfs_release,
148 .unlocked_ioctl = jfs_ioctl,
149#ifdef CONFIG_COMPAT
150 .compat_ioctl = jfs_compat_ioctl,
151#endif
152};
1/*
2 * Copyright (C) International Business Machines Corp., 2000-2002
3 * Portions Copyright (C) Christoph Hellwig, 2001-2002
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include <linux/mm.h>
21#include <linux/fs.h>
22#include <linux/posix_acl.h>
23#include <linux/quotaops.h>
24#include "jfs_incore.h"
25#include "jfs_inode.h"
26#include "jfs_dmap.h"
27#include "jfs_txnmgr.h"
28#include "jfs_xattr.h"
29#include "jfs_acl.h"
30#include "jfs_debug.h"
31
32int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
33{
34 struct inode *inode = file->f_mapping->host;
35 int rc = 0;
36
37 rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
38 if (rc)
39 return rc;
40
41 inode_lock(inode);
42 if (!(inode->i_state & I_DIRTY_ALL) ||
43 (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
44 /* Make sure committed changes hit the disk */
45 jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
46 inode_unlock(inode);
47 return rc;
48 }
49
50 rc |= jfs_commit_inode(inode, 1);
51 inode_unlock(inode);
52
53 return rc ? -EIO : 0;
54}
55
56static int jfs_open(struct inode *inode, struct file *file)
57{
58 int rc;
59
60 if ((rc = dquot_file_open(inode, file)))
61 return rc;
62
63 /*
64 * We attempt to allow only one "active" file open per aggregate
65 * group. Otherwise, appending to files in parallel can cause
66 * fragmentation within the files.
67 *
68 * If the file is empty, it was probably just created and going
69 * to be written to. If it has a size, we'll hold off until the
70 * file is actually grown.
71 */
72 if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
73 (inode->i_size == 0)) {
74 struct jfs_inode_info *ji = JFS_IP(inode);
75 spin_lock_irq(&ji->ag_lock);
76 if (ji->active_ag == -1) {
77 struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
78 ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
79 atomic_inc(&jfs_sb->bmap->db_active[ji->active_ag]);
80 }
81 spin_unlock_irq(&ji->ag_lock);
82 }
83
84 return 0;
85}
86static int jfs_release(struct inode *inode, struct file *file)
87{
88 struct jfs_inode_info *ji = JFS_IP(inode);
89
90 spin_lock_irq(&ji->ag_lock);
91 if (ji->active_ag != -1) {
92 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
93 atomic_dec(&bmap->db_active[ji->active_ag]);
94 ji->active_ag = -1;
95 }
96 spin_unlock_irq(&ji->ag_lock);
97
98 return 0;
99}
100
101int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
102{
103 struct inode *inode = d_inode(dentry);
104 int rc;
105
106 rc = inode_change_ok(inode, iattr);
107 if (rc)
108 return rc;
109
110 if (is_quota_modification(inode, iattr)) {
111 rc = dquot_initialize(inode);
112 if (rc)
113 return rc;
114 }
115 if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
116 (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
117 rc = dquot_transfer(inode, iattr);
118 if (rc)
119 return rc;
120 }
121
122 if ((iattr->ia_valid & ATTR_SIZE) &&
123 iattr->ia_size != i_size_read(inode)) {
124 inode_dio_wait(inode);
125
126 rc = inode_newsize_ok(inode, iattr->ia_size);
127 if (rc)
128 return rc;
129
130 truncate_setsize(inode, iattr->ia_size);
131 jfs_truncate(inode);
132 }
133
134 setattr_copy(inode, iattr);
135 mark_inode_dirty(inode);
136
137 if (iattr->ia_valid & ATTR_MODE)
138 rc = posix_acl_chmod(inode, inode->i_mode);
139 return rc;
140}
141
142const struct inode_operations jfs_file_inode_operations = {
143 .setxattr = jfs_setxattr,
144 .getxattr = jfs_getxattr,
145 .listxattr = jfs_listxattr,
146 .removexattr = jfs_removexattr,
147 .setattr = jfs_setattr,
148#ifdef CONFIG_JFS_POSIX_ACL
149 .get_acl = jfs_get_acl,
150 .set_acl = jfs_set_acl,
151#endif
152};
153
154const struct file_operations jfs_file_operations = {
155 .open = jfs_open,
156 .llseek = generic_file_llseek,
157 .read_iter = generic_file_read_iter,
158 .write_iter = generic_file_write_iter,
159 .mmap = generic_file_mmap,
160 .splice_read = generic_file_splice_read,
161 .splice_write = iter_file_splice_write,
162 .fsync = jfs_fsync,
163 .release = jfs_release,
164 .unlocked_ioctl = jfs_ioctl,
165#ifdef CONFIG_COMPAT
166 .compat_ioctl = jfs_compat_ioctl,
167#endif
168};